Two slits separated by 0.050 mm are illuminated with green light (? = 540 nm). How many bands of bright lines are there between the central maximum and the 12-cm position? (The distance between the double slits and the screen is 1.0 m.)
a. 1111
b. 111
c. 11
d. 1
e. 11111
c
Physics & Space Science
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A star has a parallax angle of 0.2 arc seconds, which means it is at a distance of
A. 2 light-years. B. 5 light-years. C. 5 parsecs. D. 2 parsecs.
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The Moon's average density is
a. greater than Earth's. b. less than Earth's. c. approximately the same as Earth's. d. nonexistent because water is not present.
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Given that the binding energy of the hydrogen atom in its ground state is -13.6 eV, what is the energy when it is in the n = 5 state?
A) -2.72 eV B) 0.544 eV C) -0.544 eV D) 2.72 eV
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How much power is theoretically available from a mass flow of 1 000 kg/s of water when it falls a vertical distance of 100 meters?
a. 980 kW b. 98 kW c. 4 900 W d. 980 W e. 9 600 W
Physics & Space Science